PROTECTIVE RELAY SYSTEM

22 Protective relaying apparatus of the pilot type, incorporating a direct transfer trip function (DTT) which reliably and securely utilizes the same communication channel utilized by the pilot relaying function. The DTT function operates within the constraints of a PPM modem, utilizing a signal ext...

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Bibliographische Detailangaben
1. Verfasser:	SUN, SHAN C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	22 Protective relaying apparatus of the pilot type, incorporating a direct transfer trip function (DTT) which reliably and securely utilizes the same communication channel utilized by the pilot relaying function. The DTT function operates within the constraints of a PPM modem, utilizing a signal extracted from the carrier signal, to provide a perfectly synchronized tone for the DTT signal.